Solution of the optimal reactive power dispatch for power systems by using novel charged system search algorithm

Proper reactive power dispatch can not only reduce the active power loss, but also can improve the voltage stability, and make the system operate in the security operation range. In this paper, we use intelligent control method is used to implement optimal reactive power dispatch for IEEE30-bus and IEEE57-bus systems. And we use three types of optimization algorithms to compare: Charged System Search (CSS), Particle Swarm Optimization (PSO), and Hybrid Charged System Search and Particle Swarm Optimization (HCSSPSO). Analysis of reactive power dispatch benefits. In this paper, the optimal objective function is to minimize the loss rate in the transmission line, and satisfies all the constraints of the system, be sure to consider the optimal objective function range of within a reasonable. From the simulation results, HCSSPSO can get the global optimal solution faster than CSS and PSO. Therefore, the times of solve can be reduced and the global optimal solution can be obtained more easily. Through the analysis of both the IEEE 30-bus and IEEE 57-bus systems, it is demonstrated that the optimization method used is feasible for reactive power dispatch, reducing the active power loss in the transmission line and keeping the load bus voltage range of within a reasonable. Expect to help dispatchers make more economical and secure dispatch.